Small Engines (Lawn Mowers, etc.)/lawn chief solenoid issues


I have a lawn chief 440 12.5 i/c39 it keeps burning up the solenoid. Do you know what may be causing this?

Pretty unusual to keep burning up solenoids.  The mower is quite old so I'd suspect bad battery cables could be the problem.  If the old cables have a lot of resistance then they could cause more current to pass through the solenoid heating it up.

How old is the battery?  Have you ever dis-connected all the large positive and negative battery cable connection with a wirebrush or sandpaper?

Do you have a volt meter to measure voltage drop across the cables?

Many times when electric components burn up due to heat the real problem was increased resistance in the circuit, which requires more current which creates more heat.  Pretty common in motorcycles as they have too small of wire in their circuits.  Changing to heavier or additional wire prevents many electrical components from failing, or at least prolongs their life.

Make sure the solenoid mounting connections are clean as well as the metal solenoid mount is the solenoid ground.

Let me know if you have a volt meter.


Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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